Loose-leaf binder.



PATBNTED APR. so, 1907.

was $05 Marv/6dr:

UNITED STATES PATENT OFFICE.

PAUL REVERE, OF NEW YORK, N. Y., ASSIGNOR TO ASA L. SHIPL [ANS SONS,

OF NEXV YORK, N. Y., A FIRM.

LOOSE-LEAF BINDER.

Specification of Letters Patent.

Patented April 30, 1907.

To (AZ/ lull/mt [It new CON/067":

Be it known that 1, PAUL REVERE, a citizen of the United States, residing in the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Loose-Leaf Binders, of which the following is a specification.

The invention relates to the impaling-posts IO and the bars connected thereto, and the object of the invention is to provide a binder in which these parts are simple and inexpensive to manufacture and in which the posts may be lengthened or shortened as required in conditioning the binder to receive a greater or less number of leaves.

The invention consists in certain novel features and details of construction by which the above objects are attained, to be hereinafter described.

The accompanying drawings form a part of this specification and show the invention as it has been carried out in practice.

Figure 1 is a face view or front elevation of the metal parts of a binder made in accordance with the invention. Fig. 2 is a corresponding vertical section partly in elevation. Fig. 3 is an elevation of the upper part of one of the posts. Fig. 4 is a vertical section of the same. Figs. 5 and 6 are vertical sections showing modifications of the same part.

Similar letters of reference indicate like parts in all the figures.

The invention is in that class in which the leaves are held on sectional posts joined at the ends to bars, one of which is removable. A and B are the top and bottom bars respectively, each preferably of sheet metal folded to U-shape in cross-section, and joined each to the other by the posts C, two posts are shown in. the drawing but it will be understood that there may be as many as required, determined by the length of the bars-A B and by the size and weight of the leaves.

In the lower bar B are two hollow sockets B B, each riveted to the lower plate of the bar and screw threaded interiorly to receive a corresponding screw threaded nipple C on a post section (l. The latter is also hollow and drilled and tapped to receive a similar section. Each post may be thus built up to provide the desired space between the bars to accommodate the leaves and may be increased or diminished as required.

D D are thimbles of sheet-metal extending loosely through the upper bar and engaged therein by slight flanges on their upper and lower edges. Each thimble is cut longitudinally to permit reduction in diameter by external pressure, such pressure being produced by turning a rod G lying in the fold or bight of the upper bar and held by the engagement of grooves g with the thimbles. The grooves g are so shaped that the axial turning of the rod by the application of a key or similar sockcted instrument to its squared end G will alternately press upon. and release the thimbles.

The uppermost post-section O differs from the others in that it is provided with a solid extension C received in the corresponding t'himble I) and firmly held therein by the rod G as above described. This extension may be integral with the upper post-section as shown in Figs. 3 and 4, or may be a separate 7: plug screwed into such section as in Figs. 5 and 6.

In either form an annular shoulder or offset 0 is provided to serve as a seat for the upper bar, which shoulder may be the upper face of the post-section C or a flange C on a plug C" as in Fig. 6.

All the post sections except the uppermost (J are cylindrical and interiorly and exteriorly threaded to be interchangeable. The upper section may be screwed directly into the socket B to provide for a lesser number of leaves, oras many intermediate sections may be added as found necessary. In either condition a firm smoothly cylindrical post is afforded. Each section is preferably perforated transversely as at c to receive a pin or other instrument to aid in joining and separating the sections.

It will be noted that the construction shown permits the upper face of the upper bar and lower face of the lower bar to be practically plane, the only projections being the flat rivet heads on the sockets B and the slight flanges on the thimblcs D. It will be also noticed that the top section and the thimble are so relatively proportioned and constructed that said top sections can never be protruded through the thimble and hence never projects beyond the upper face of the top-bar. This is important in producing an attractive ledger or like book with smooth exterior surfaces.

The solidity of the extensions 0 is imporsaid thimbles, a locking-rod rotatably mounted in the fold of said top bar and constructed to compresssaid thimbles, posts composed of I interchangeable cylindrical sections screwed axially into said sockets and each other, and a top section for each post, a shoulder on said top section, and a solid cylindrical extension thereon matching to and received in one of said thimbles.

3. A loose-leaf binder, comprising a bottom-bar, screw-threaded sockets therein, a top-bar, compressible tubular thimbles therein, locking means within the top-bar to comi press said thimbles, posts comprising seetions screwed into said sockets and each other, and a top-section for each post having a portion received in one of said thimbles, said top-section having means to limit its entrance into its thimble to prevent the upper end of said topection at all times from protant in successfully resisting the crushing} strains of the locking-rod G and thus avoiding distortion.

The threaded nipples on all the post sec,- tions are similar so that the posts may be built up without special selection or location of parts, and the screw engagement of the nipples with adjacent sections insures great l strength, rigidity and alinement.

The number of posts may be increased as f found necessary or desirable.

I claim 1. In a loose leaf binder, a bottom bar, screw-threaded sockets therein, a top bar, tubular thimbles therein, locking means in said top bar constructed to compress said thimbles, and posts composed of interchangel able sections constructed to be screwed into said sockets and each other, and a top section 3 for each post having a shoulder, and an eX- l tension matching to and received in one of I truding therethrough. I said thimbles and terminating within said In testimony that I claim the invention thimbles. above set forth I afli'X my signature, in pres- 2. In a loose leaf binder, a bottom bar of f ence of two witnesses.

U-section, screw-threaded sockets extending through said bottom bar and riveted in the lower plate thereof, a top bar of U-section, tubular thimbles extending loosely through said top bar and held therein by flanges on PAUL REVERE.

Witnesses:

CHAs. A. HAUOK, CHARLES R. SEARLE 

